<!DOCTYPE html>
<html>
<head>
<style> 
#rcorners1 {
  border-radius: 25px;
  background: red;
  padding: 0px; 
  width: 500px;
  height: 250px;  
}

#rcorners2 {
  border-radius: 25px;
  border: 2px solid #73AD21;
  padding: 20px; 
  width: 400px;
  height: 250px;  
}

#rcorners3 {
  border-radius: 25px;
  /* background: url(static/css/paper.jpg); */
  /* background-image: url(paper.jpg); */
  background: url(static/img/paper.jpg);
  background-position: left top;
  background-repeat: repeat;
  padding: 20px; 
  width: 200px;
  height: 150px;  
}
</style>
</head>
<body>

<h1>border-radius 属性</h1>

<p>拥有指定背景颜色的元素的圆角：</p>
<p id="rcorners1">Rounded corners!</p>
<p>带边框元素的圆角：</p>
<p id="rcorners2">Rounded corners!</p>
<p>拥有背景图片的元素的圆角：</p>
<p id="rcorners3">Rounded corners!</p>

</body>
</html>
